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mikecousins committed Sep 16, 2022
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160 changes: 160 additions & 0 deletions packages/react-pdf-js/README.md
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# react-pdf-js

`react-pdf-js` provides a component for rendering PDF documents using [PDF.js](http://mozilla.github.io/pdf.js/).

---

[![NPM Version](https://img.shields.io/npm/v/@mikecousins/react-pdf.svg?style=flat-square)](https://www.npmjs.com/package/@mikecousins/react-pdf)
[![NPM Downloads](https://img.shields.io/npm/dm/@mikecousins/react-pdf.svg?style=flat-square)](https://www.npmjs.com/package/@mikecousins/react-pdf)
[![Netlify Status](https://api.netlify.com/api/v1/badges/4ce8e5b5-16ca-4942-8c47-095debbc4693/deploy-status)](https://app.netlify.com/sites/pdf/deploys)
[![codecov](https://codecov.io/gh/mikecousins/react-pdf-js/branch/master/graph/badge.svg)](https://codecov.io/gh/mikecousins/react-pdf-js)

# Demo

https://pdf.netlify.com

# Usage

Install with `yarn add @mikecousins/react-pdf pdfjs-dist` or `npm install @mikecousins/react-pdf pdfjs-dist`

## `usePdf` hook

Use the hook in your app (showing some basic pagination as well):

```js
import React, { useState, useRef } from 'react';
import { usePdf } from '@mikecousins/react-pdf';

const MyPdfViewer = () => {
const [page, setPage] = useState(1);
const canvasRef = useRef(null);

const { pdfDocument, pdfPage } = usePdf({
file: 'test.pdf',
page,
canvasRef,
});

return (
<div>
{!pdfDocument && <span>Loading...</span>}
<canvas ref={canvasRef} />
{Boolean(pdfDocument && pdfDocument.numPages) && (
<nav>
<ul className="pager">
<li className="previous">
<button disabled={page === 1} onClick={() => setPage(page - 1)}>
Previous
</button>
</li>
<li className="next">
<button
disabled={page === pdfDocument.numPages}
onClick={() => setPage(page + 1)}
>
Next
</button>
</li>
</ul>
</nav>
)}
</div>
);
};
```

## Props

When you call usePdf you'll want to pass in a subset of these props, like this:

> `const { pdfDocument, pdfPage } = usePdf({ canvasRef, file: 'https://example.com/test.pdf', page });`
### canvasRef

A reference to the canvas element. Create with:

> `const canvasRef = useRef(null);`
and then render it like:

> `<canvas ref={canvasRef} />`
and then pass it into usePdf.

### file

URL of the PDF file.

### onDocumentLoadSuccess

Allows you to specify a callback that is called when the PDF document data will be fully loaded.
Callback is called with [PDFDocumentProxy](https://github.com/mozilla/pdf.js/blob/master/src/display/api.js#L579)
as an only argument.

### onDocumentLoadFail

Allows you to specify a callback that is called after an error occurred during PDF document data loading.

### onPageLoadSuccess

Allows you to specify a callback that is called when the PDF page data will be fully loaded.
Callback is called with [PDFPageProxy](https://github.com/mozilla/pdf.js/blob/master/src/display/api.js#L897)
as an only argument.

### onPageLoadFail

Allows you to specify a callback that is called after an error occurred during PDF page data loading.

### onPageRenderSuccess

Allows you to specify a callback that is called when the PDF page will be fully rendered into the DOM.
Callback is called with [PDFPageProxy](https://github.com/mozilla/pdf.js/blob/master/src/display/api.js#L897)
as an only argument.

### onPageRenderFail

Allows you to specify a callback that is called after an error occurred during PDF page rendering.

### page

Specify the page that you want to display. Default = 1,

### scale

Allows you to scale the PDF. Default = 1.

### rotate

Allows you to rotate the PDF. Number is in degrees. Default = 0.

### cMapUrl

Allows you to specify a cmap url. Default = '../node_modules/pdfjs-dist/cmaps/'.

### cMapPacked

Allows you to specify whether the cmaps are packed or not. Default = false.

### workerSrc

Allows you to specify a custom pdf worker url. Default = '//cdnjs.cloudflare.com/ajax/libs/pdf.js/\${pdfjs.version}/pdf.worker.js'.

### withCredentials

Allows you to add the withCredentials flag. Default = false.

## Returned values

### pdfDocument

`pdfjs`'s `PDFDocumentProxy` [object](https://github.com/mozilla/pdf.js/blob/master/src/display/api.js#L579).
This can be undefined if document has not been loaded yet.

### pdfPage

`pdfjs`'s `PDFPageProxy` [object](https://github.com/mozilla/pdf.js/blob/master/src/display/api.js#L897)
This can be undefined if page has not been loaded yet.

# License

MIT © [mikecousins](https://github.com/mikecousins)
2 changes: 1 addition & 1 deletion packages/react-pdf-js/package.json
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{
"name": "@mikecousins/react-pdf",
"version": "6.1.0",
"version": "6.1.1",
"description": "Simple React component to wrap up PDF.js. The easiest way to render PDFs in your React app.",
"author": "mikecousins",
"license": "MIT",
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